* config/mips/tm-mips.h (PC_IN_CALL_DUMMY): Removed, the default

	* config/mips/tm-mips.h (PC_IN_CALL_DUMMY):  Removed, the default
	definition in inferior.h is sufficient.
	* mips-tdep.c (mips_pc_in_call_dummy):  Ditto.
	(mips_push_arguments):  Make sure that the stack is aligned to a
	multiple of 8 after the arguments are pushed.
	Structures are always passed by value in the old ABI.
	Adjust argument register value on big endian targets when passing
	a value whose length is less than the register size.
	Write stack arguments with a single write_memory call.
	(mips_pop_frame):  Use frame_saved_regs instead of proc_desc to
	decide which registers have to be restored.